散点分布在一条直线上，且X增加时Y值增大，可初步判断两变量为
A．正相关关系B．负相关关系C．完全负相关D．还不能确定E．完全正相关
参考答案：E
单词拼写。
1. The balloon suddenly b_______.
2. He was badly i_______ in the accident.
3. They r______ a boy from drowning.
4. All his life was full of______ (痛苦).
5. Trees along the road provide s______ from the sun for the farmers.
6. It is reported that the forests in Russian have been d______ by one fire after another.
用复凝聚法制备微囊时，甲醛作为
A．增塑剂
B．固化剂
C．助溶剂
D．凝聚剂
E．乳化剂
